Soloing this week's tier 3 rune is ridiculously easy if you have an exotic sword. Kill orbs, kill ogre with sniper, rush wizard and spam R2 3 times, done.
I don't think that it ever occurred to me that doing that solo would result in significantly easier fight. It's fairly obvious if you think about it but my brain never made the connection. Now that I have a couple of new antiquated runes thanks to King's Fall I definitely need to go back to the court for a few more fragments.